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83 lines
3.4 KiB
C
83 lines
3.4 KiB
C
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/* meta-cogl-utils.c
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*
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* Copyright 2020 Georges Basile Stavracas Neto <georges.stavracas@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "backends/native/meta-cogl-utils.h"
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#include <drm_fourcc.h>
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typedef struct _PixelFormatMap {
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uint32_t drm_format;
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CoglPixelFormat cogl_format;
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CoglTextureComponents cogl_components;
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} PixelFormatMap;
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static const PixelFormatMap pixel_format_map[] = {
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/* DRM formats are defined as little-endian, not machine endian. */
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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{ DRM_FORMAT_RGB565, COGL_PIXEL_FORMAT_RGB_565, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_ABGR8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XBGR8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_ARGB8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XRGB8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_BGRA8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_BGRX8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_RGBA8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_RGBX8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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/* DRM_FORMAT_RGB565 cannot be expressed. */
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{ DRM_FORMAT_ABGR8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XBGR8888, COGL_PIXEL_FORMAT_ABGR_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_ARGB8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_XRGB8888, COGL_PIXEL_FORMAT_ARGB_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_BGRA8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_BGRX8888, COGL_PIXEL_FORMAT_BGRA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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{ DRM_FORMAT_RGBA8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGBA },
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{ DRM_FORMAT_RGBX8888, COGL_PIXEL_FORMAT_RGBA_8888_PRE, COGL_TEXTURE_COMPONENTS_RGB },
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#else
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#error "unexpected G_BYTE_ORDER"
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#endif
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};
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gboolean
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meta_cogl_pixel_format_from_drm_format (uint32_t drm_format,
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CoglPixelFormat *out_format,
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CoglTextureComponents *out_components)
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{
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const size_t n = G_N_ELEMENTS (pixel_format_map);
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size_t i;
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for (i = 0; i < n; i++)
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{
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if (pixel_format_map[i].drm_format == drm_format)
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break;
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}
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if (i == n)
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return FALSE;
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if (out_format)
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*out_format = pixel_format_map[i].cogl_format;
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if (out_components)
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*out_components = pixel_format_map[i].cogl_components;
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return TRUE;
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}
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